Mineral (Refined Metal)

Anthracite Coal with Sulfur staining

Anthracite (Carbon C with impurities)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron Oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Hematite

Hematite (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Blue Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Black Tourmaline (Schorl)

Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Mica Sand / Vermiculite

Phyllosilicate group (typically Biotite or Muscovite)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Tumbled Hematite

Hematite (Alpha iron oxide, Fe2O3)

Pyrite

Iron Pyrite (FeS2)

Sphalerite with Siderite and Pyrite

Zinc Sulfide (ZnS) with Iron Carbonate (FeCO3) and Iron Disulfide (FeS2)

Gold Nugget

Native Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Gold-bearing Quartz (Auriferous Quartz)

Quartz (SiO2) with native Gold (Au) inclusions

Pyrite

Iron Sulfide (FeS2)

Arfvedsonite

Arfvedsonite [Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2]

Magnetite / Ironstone

Magnetite (Fe3O4)

Hematite

Iron (III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Arsenopyrite

Arsenopyrite (FeAsS)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Hematite (Botryoidal)

Hematite (Fe2O3)

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Hematite

Iron(III) oxide (Fe2O3)

Pyrite-rich Gossan

Iron Sulfide (FeS2) in Ore Matrix

Magnetite

Magnetite (Fe3O4)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Hematite

Iron(III) oxide (Fe2O3)

Gold in Quartz Matrix

Native Gold (Au) in Quartz (SiO2)

Hematite

Hematite (Fe2O3)

Hematite

Hematite (Fe2O3)

Bronzite

(Mg,Fe)SiO3

Magnetite with Serpentine

Magnetite (Fe3O4) in Serpentine Matrix

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)